Final answer:
The poet/narrator expresses an emotional state of routine ennui and self-doubt, feeling insufficient to task, rather than overconfidence, busyness, or a literal addiction.
Step-by-step explanation:
The lines from the poem reveal that the poet,narrator, is experiencing a sense of existential ennui and a profound connection with routine mundane experiences. The phrase "I have measured out my life with coffee spoons" suggests a meticulous but trivial engagement with the passing of time, reflecting a monotonous and possibly unfulfilled life. The repetitive mention of "I have known" underscores a weariness and saturation with life's experiences, while the final rhetorical question "So how should I presume?" hints at a self-doubt or hesitancy to make assertions or take actions. This emotional state points to a feeling of insufficiency or helplessness (option D), rather than overconfidence (A), being too busy (B), or a literal caffeine addiction (C).